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Cascade Microtech, Inc., a leader at enabling precision measurements of integrated circuits at the wafer level, and imec, a world-leading nanoelectronics research center, today announced breakthroughs in probing stacked integrated circuits (3D-SICs), fueling an important growth engine for the semiconductor market. Through a Joint Development Agreement, Cascade Microtech, Inc. partnered with imec to successfully probe 25µm-diameter micro-bumps on a wide I/O test wafer with its fully-automated CM300 probe solution utilizing an advanced version of Pyramid Probe technology. This achievement comes as part of imec’s 3D integration research program which includes other industry partners from the entire semiconductor value chain.

The 3D semiconductor market (including 3D-SIC, 2.5D interposer, and 3D WLCSP) is expected to represent 9% of the total semiconductor value by 2017, according to Yole Developpement. Logic 3D SoC/SiP (including interposer chips, APE, CPU, FPGA, wide IO memory, etc.) will be the biggest industry using 3D platforms in the next few years. 3D applications will emerge in high-performance computing, and electronic markets such as nanotechnology and medical applications, which will benefit from the high-density integration that 3D technology offers.

Semiconductor industry is exploring new methods to increase the functionality of ICs at smaller footprint extending Moore’s law. 3D-SICs offers a solution to the speed, power and density requirements demanded by future mobile electronics platforms. Through-Silicon Vias (TSV) used in 3D-SICs, shorten interconnects between logic elements, thus reducing power while increasing performance. Within imec’s 3D integration research program, industry leaders are jointly developing design, manufacturing, and test solutions to bring this new technology to high-volume manufacturing.

Cascade Microtech’s CM300 flexible on-wafer measurement system was designed to deliver superior positioning accuracy and repeatable contact, offering a level of precision that supports both shrinking pad sizes and pitch roadmaps. The CM300 captures the true electrical performance of devices with high-performance capabilities that include low leakage and low noise. As a comprehensive probing solution employing the latest advances in Pyramid Probe technology, the CM300 has proven to meet the fine-pitch (40µm area array), low-force (< 1gf/tip) advanced probing requirements of 3D-SICs.

“We are excited that our work with Cascade Microtech has resulted in such a breakthrough. I believe together we’ve achieved a first in the industry,” said Erik Jan Marinissen, Principal Scientist at imec in Leuven, Belgium. “We are able to hit 25µm-diameter micro-bumps with a high level of accuracy due to the probe-to-pad alignment features of Cascade Microtech’s CM300. And advances in their Pyramid Probe technology have enabled us to probe micro-bumped wafers with 40/50µm pitch according to the JEDEC Wide-I/O Mobile DRAM standard.”

“Cascade Microtech’s CM300 probe solution is designed to provide greater alignment accuracy to probe directly on small, fragile micro-bumps. In conjunction with a fine-pitch, low-force Pyramid Probe card, we have achieved consistent, accurate measurements on a wide-IO test wafer using a single-channel, wide-IO probe core with an array of 6 x 50 tips at 40/50µm pitch, with the ability to shrink down to 20µm pitches in the future,” said Debbora Ahlgren, Vice President, Cascade Microtech, Inc. “Together, imec and Cascade Microtech are enabling the on-going future of CMOS technologies through this ground-breaking work. 3D integration will undoubtedly result in increased performance and yield while reducing overall costs.”

About Cascade Microtech, Inc.
Cascade Microtech, Inc. (cascademicrotech.com) is a worldwide leader in precision contact, electrical measurement and test of integrated circuits (ICs), optical devices and other small structures. For technology businesses and scientific institutions that need to evaluate small structures, Cascade Microtech delivers access to electrical data from wafers, ICs, IC packages, circuit boards and modules, MEMS, 3D TSV, LED devices and more. Cascade Microtech’s leading-edge stations, probes, probe cards and integrated systems deliver precision accuracy and superior performance both in the lab and during production manufacturing of high-speed and high-density semiconductor chips.

About imec
Imec (imec.be) performs world-leading research in nanoelectronics. Imec leverages its scientific knowledge with the innovative power of its global partnerships in ICT, healthcare and energy. Imec delivers industry-relevant technology solutions. In a unique high-tech environment, its international top talent is committed to providing the building blocks for a better life in a sustainable society. Imec is headquartered in Leuven, Belgium, and has offices in Belgium, the Netherlands, Taiwan, US, China, India and Japan. Its staff of more than 2,000 people includes more than 650 industrial residents and guest researchers. In 2012, imec's revenue (P&L) totaled 320 million euro.

Imec is a registered trademark for the activities of IMEC International (a legal entity set up under Belgian law as a "stichting van openbaar nut”), imec Belgium (IMEC vzw supported by the Flemish Government), imec the Netherlands (Stichting IMEC Nederland, part of Holst Centre which is supported by the Dutch Government), imec Taiwan (IMEC Taiwan Co.) and imec China (IMEC Microelectronics (Shangai) Co. Ltd.) and imec India (Imec India Private Limited).

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